To find the value of a variable you must know the basics of pre-Algebra.
Example:
2x+9=39
To find he answer of this you must subtract 9 from both sides
Then you are left with…
2x=30
Since 2x=30 means 2 times x equals 30
You can divide 2 from both sides to find the answer
Which is…
x=15
Answer:
Step-by-step explanation:
54
15m=-23
104
Any expression multiplied by 0 equals 0
when adding or subtracting 0, the quantity doesn't change
